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Table 2 Dietary intake frequency for specifics food group and diet index scores among 208 children living in Mexico City, 2003-2005

From: Dietary intake, lung function and airway inflammation in Mexico City school children exposed to air pollutants

Characteristics

Asthmatic (n = 158)

Non-asthmatic (n = 50)

Fruit or fruit juice (%)

  

   At least 4 times a month

4.4

1.8

   2-6 times per week

34.2

23.6

   More than once per day

61.4

74.6

Vegetables (%)

  

   At least 4 times a month

1.9

1.8

   2-6 times per week

28.3

27.3

   More than once per day

69.8

70.9

Cereals or grains (%)

  

   At least 4 times a month

0.6

0.0

   2-6 times per week

21.4

20.0

   More than once per day

78.0

80.0

Legumes (%)

  

   At least 4 times a month

28.9

38.2

   2-6 times per week

50.9

50.9

   More than once per day

20.1

10.9

Dairy products (%)

  

   At least 4 times a month

1.3

0.0

   2-6 times per week

8.8

12.7

   More than once per day

89.9

87.3

Meat

  

   At least 4 times a month (%)

6.9

10.9

   2-6 times per week (%)

76.1

76.4

   More than once per day (%)

17.0

12.7

Fish (%)

  

   At least 4 times a month

76.7

74.6

   2-6 times per week

22.6

23.6

   More than once per day

0.6

1.8

Junk food (%)

  

   At least 4 times a month

0.6

1.8

   2-6 times per week

34.6

21.8

   More than once per day

64.8

76.4

Calories, kcal

  

(median (Q25, Q75))§

1797.4(1594.9, 2194.4)

1795.2(1569.6, 2311.9)

Vitamins (%)

54.4

56.4

Fruit and vegetable index (%)

  

   0

14.4

14.5

   1

33.1

25.4

   2

36.2

43.6

   3

16.2

16.4

Mediterranean diet index (%)

  

   1

37.5

41.8

   2

18.1

25.4

   3

23.7

16.4

   4

20.6

16.4

  1. § Mann-Whitney test [median (Q25, Q75)]